Stick Horse at Town Hall 18: max level 27. It unlocks at Town Hall 8. Max level per Town Hall: TH8 12, TH9 12, TH10 15, TH11 15, TH12 18, TH13 18, TH14 21, TH15 24, TH16 27, TH17 27, TH18 27.
Tap a Town Hall to open this item there. Dashed: not available at that Town Hall yet.